Respirator



A. PATUS.

RESPIRATOB. APPLICATION FILED APR. 29. 1918.

Patented Eng, 5, 1919.

2 SHEETSSHEET l- Awavrae flrrolwvar.

A. PATUS. RESPIRATOR- APPLICATION FILED APR. 29, I918.

2 SHEETS-SHEET 2- Patented Aug. 5, 1919.

' UNITED STATES PATENT OFFICE.

ALEXANDER PA'IUS, OF SOUTH BEND, INDIANA, ASSIGNOR 0F ONE-HALF T0 HAIRRY H. MANDEL, OF SOUTH BEND, INDIANA RESPIRATOR.

iniaeoo.

Specification of Letters Patent.

Patented Aug. 5, 1919..

Application filed April 29, 1918. Serial No. 231,408.

To all whom it may concern:

Be it known that l[, ALEXANDER PATUS, a subject of Austria-Hungary, residing at South Bend, in the county of St. Joseph and State of Indiana, have invented certain new and useful Improvements in Respirators, of which the following is a specification.

My invention relates to a respirator adapted to be worn on the face of a person in a position to overlie the nose and mouth in a manner to prevent inhalation of noxious air, dust, smoke, poisonous gases, and the like.

The object of the invention is to provide a device of the character mentioned which is simple in structure, highly eflicient for the purpose intended, and in which the air-inlet and outlet controlling valves are arranged to be easily and readily accessible for repair and replacement. A further object resides in the provision of means adapted to retain a portion of the air exhaled as a protective body between the vent openings and Y the atmosphere, whereby the slightest possibility of poisonous gases entering the respi rator in the inhalation process, due to imperfect seating or sufliciently rapid opera- .tion of the vent valve, will be effectually prevented.

With the above and further objects in view, as will hereinafter appear, the invention in the preferred form of details will be described in the following specification, reference being had particularly to the accompanying drawings forming a part of this ap' plication, in which Figure 1 is a view showing the manner of applying the. respirator to the face of a person.

Fig. 2 1s a front elevation ofthe device. Fig. 3 is a side elevation thereof.

Fig. 4; is a plan or top view thereof.

Fig. 5 is a rear view thereof.

Fig. 6 is a vertical sectional view, partly in elevation, taken on the line 6-6 of Fig. 5.;

ing cushion 12, so that same will more readily conform and effect a tight fit against the face ,and render the same more comfortable to wear.

Having connection with the forward end of the shell is an air-intake tube 13, which may ily flex in the breathing process,-and tightly seat against the wall to close the opening under air pressure from within due to exhalation. The flexible valve 17 is held to place by a small metal bar 18 disposed centrally thereof and held to place by screws 19, the bar serving to clamp the'same between it and the wall'l5 on either side of the opening. Fhis simple valve structure and means for mounting the same, as Well as the particular location of the valve, same being disposed as shown so as to be readily and easily accessible through the open side of the shell, permits the valve to be easily and quickly re- 5 Located at theupper side of the shell, and

integrally formed therewith, is a projection or dome having two angularly related plane surfaces 20, each provided with vent openings 21, which in turn are normally held closed by flexible sheet rubber valve members 22, which overlie said openings and are held tightly seated by external air pressure in the inhalation process, as will be obvious. Each of such flexible valve members is secured or held to place by small metal bars 23, attached by means of screws 24: threaded into the shell, the bars holding the valve members clamped against the wall of the shell in a manner so that the same will be free to flex outwardly to either side of the securing bar in the exhalation process, and tightly seat in the inhalation process. It will be noted from reference to Fig. 4, that the vent valves being exteriorly located so as to be readily accessible permits the valves to be easily and quickly replaced or adjusted. Under certain conditions of use the rubber valves may require frequent replacement, hence the simple means of mounting same as well as their disposition so as to be readily accessible, forms an important feature of the invention.

Removably mounted upon the shell and adapted to overlie the vent openings, is a can 25 of substantially U-form so as to seat astride the cap, and its intermediate portion closely fitting over the dome portion of the shell, as shown in Fig. 6, at the point or ridge of the dome and at the ends thereof, while the face or surface 26 thereof will be an air-chamber, as the air exhaled to the extent of the capacity thereof is retained therein, or in other words, is pocketed until the next act of exhalation, and thus provides a barrier of air between the atmosphere and the vent openings. If the atmosphere should be highly noxious or poisonous, such barrier of air would serve to prevent such from entering through thevent openings due to imperfect seating of the vent valves, or failure of the valves to seat rapid enough at the end of the exhalation period, or for any other reason. This manner of providing an air seal for the vent valves constitutes the salient feature of the invention.

By the use of a hook 28 and eye 29, the cap 25 is detachably secured to the shell, such permitting "the cap to be readily removed to provide easy access to the vent valves for the purpose of repair or replacement.

While the foregoing is the preferred form of my invention, I desire it to be understood that I do not limit myself to the precise structure shown and described, as it is obvious that the same may be variously modified without departing from the spirit of the invention.

What is claimed is:

1. A respirator including a shell having an air inlet valve, a vent valve, and a detachable cap overlying the vent valve transverse of the shell and extending partly around the shell to a point remote from said valve, the cap with the shell forming a vent passage open to the atmosphere at said remote point.

- 2. A respirator including a shell having an air intake valve, a vent valve, and a detachable cap adapted to seat astride of the shell and overlie the vent valve, the cap extending partly around the shell on both sides thereof to apoint remote from said valve,

and the cap with the shell forming a vent passage open to the atmosphere at both ends of the cap.

3. A respirator including a shell having an air intake valve,-a vent valve, and a substantially U-shaped cap adapted to seat upon the shell astride thereof and overlying the vent valve, the cap with the shell forming a passage extending downwardly to a point remote from the vent valve and open at its ends to the atmosphere.

In testimony whereof I aflix my signature.

ALEXANDER PATUS. 

